return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3CHF2 (Ethane, 1,1-difluoro-)

using model chemistry: CCSD/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCSD/aug-cc-pVDZ
 hartrees
Energy at 0K-277.712367
Energy at 298.15K 
HF Energy-276.981231
Nuclear repulsion energy131.150697
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at CCSD/aug-cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3163 3047 18.83      
2 A' 3126 3012 24.05      
3 A' 3064 2952 3.53      
4 A' 1477 1423 6.58      
5 A' 1445 1392 63.18      
6 A' 1383 1332 2.24      
7 A' 1163 1121 51.18      
8 A' 1155 1113 64.01      
9 A' 873 841 11.49      
10 A' 558 538 6.38      
11 A' 460 443 13.66      
12 A" 3155 3040 10.90      
13 A" 1478 1424 0.32      
14 A" 1382 1332 19.63      
15 A" 1149 1107 145.73      
16 A" 954 919 67.95      
17 A" 378 364 0.12      
18 A" 236 227 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 13299.1 cm-1
Scaled (by 0.9634) Zero Point Vibrational Energy (zpe) 12812.4 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at CCSD/aug-cc-pVDZ
ABC
0.31081 0.29430 0.16972

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.325 0.172 0.000
C2 -0.909 1.045 0.000
H3 1.279 0.721 0.000
F4 0.325 -0.655 1.106
F5 0.325 -0.655 -1.106
H6 -1.806 0.406 0.000
H7 -0.908 1.682 0.899
H8 -0.908 1.682 -0.899

Atom - Atom Distances (Å)
  C1 C2 H3 F4 F5 H6 H7 H8
C11.51121.10151.38101.38102.14352.14672.1467
C21.51122.21172.37362.37361.10121.10161.1016
H31.10152.21172.00732.00733.10132.55252.5525
F41.38102.37362.00732.21282.62482.65013.3167
F51.38102.37362.00732.21282.62483.31672.6501
H62.14351.10123.10132.62482.62481.80011.8001
H72.14671.10162.55252.65013.31671.80011.7974
H82.14671.10162.55253.31672.65011.80011.7974

picture of Ethane, 1,1-difluoro- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 109.271 C1 C2 H7 109.496
C1 C2 H8 109.496 C2 C1 H3 114.773
C2 C1 F4 110.228 C2 C1 F5 110.228
H3 C1 F4 107.376 H3 C1 F5 107.376
F4 C1 F5 106.481 H6 C2 H7 109.611
H6 C2 H8 109.611 H7 C2 H8 109.342
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability